Help a beginner out please! :> - Page 7 - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips

Construction Tips Construction techniques and tips

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 25th November 2011, 05:18 PM   #61
amptech is offline amptech  Scotland
diyAudio Member
 
Join Date: Jan 2009
Location: Glasgow
Send a message via MSN to amptech
Absolutjann, you could add a small solar panel charger to your new project to keep the battery topped up!
  Reply With Quote
Old 26th November 2011, 04:46 AM   #62
diyAudio Member
 
Join Date: Oct 2011
But the speaker was working absolutely fine before. Yeah Sure will replace the board I just need to take a photo of the multimeter measuring the faulty channel or something like that. I don't know what they mean when they say "test the left channel via connecting corresponding Vout + and Vout- to GND"

Maybe a kind soul will be willing to let me add them on skype, and we can do a video chat tutorial. Hmm...
  Reply With Quote
Old 26th November 2011, 10:34 AM   #63
amptech is offline amptech  Scotland
diyAudio Member
 
Join Date: Jan 2009
Location: Glasgow
Send a message via MSN to amptech
Hello aboslutjoann, yes all this advice can seem odd to understand 'place meter here and switch this and that' and wait'..... mmmm help!

you say the speaker was fine before doe's it work on the good channel?
place your speaker on the table and use a small 9v battery applied to it's connection, it will 'pop' backwards and forwards if it's ok if not it's done..next!

when measuring corresponding working channels of a working amplifier we place our meter leads on the amps out puts and take note of each side.. the - sign is ground zero point and the + the plus is straight forwards

1 question, does your multimeter have a buzz setting there should be a setting for this as most multimeter do. when you touch the probes together the meter will sound!

taking voltage measurements via ref to ground is how we carry out different voltages. via placement of the black meter lead clipped to the zero point of a peace of equipment such as the metal case etc.

try this, if you have a working amp say 2 channel, place your meter leads on one side of the speaker out connection. set your meter to ac volts only and apply signal, note the volt reading on the meter. turn down the master volume and swap the red lead over to the second channel it's ok to leave the black lead where it is as there both the same zero connection within the circuit. now slowly turn up the volume your reading will be the same as the first channel.

see how you get on..
  Reply With Quote
Old 26th November 2011, 10:51 AM   #64
diyAudio Member
 
Darkstar52's Avatar
 
Join Date: Oct 2010
Location: The Border of PA&NJ Delaware Water Gap USA
Hey Jo surf over to Amp forums go to the class D section. "Sure Electronics New Tripath Board tc2000+tp2050" thread. Post#2098 last page. Same board, same problem. His measurements were very close to yours, SURE is giving him a new board.
__________________
Take time to laugh for it is the music of the soul.
  Reply With Quote
Old 26th November 2011, 11:20 AM   #65
amptech is offline amptech  Scotland
diyAudio Member
 
Join Date: Jan 2009
Location: Glasgow
Send a message via MSN to amptech
would agree there, with chip based d boards if they screw up just replace em..unless you've got time to remove ic's etc...
  Reply With Quote
Old 29th November 2011, 05:01 AM   #66
diyAudio Member
 
Join Date: Oct 2011
Hi guys,

Yes I'm planning to get a replacement of the amplifier as I think it is faulty(or maybe I wrecked it haha!) Anyway, when Sure emailed me the first time, I sent them two pictures:

Click the image to open in full size.
&
Click the image to open in full size.

I got this email back:
"Dear Sir(sir?!?!?!),

Thanks a lot for your message,
I am sorry, there may be some misleading.

The first picture is correct and second is not.

First, please measure the voltages of u1/u2/u3/u4 as the attachment shown when the board is powered;

Second, please measure the resistance of r1/r2/r3/r4 as the attachment show when the board is not powered!

Please send us the pictures of results measured by multimeter!"

And they attached this photo:
2@15w | Flickr - Photo Sharing!

Okay, I'm really confused. Could someone maybe show me a picture for an example? I have no idea what I'm doing >,<

Cheers!
Jo
  Reply With Quote
Old 29th November 2011, 05:02 AM   #67
diyAudio Member
 
Join Date: Oct 2011
Oops, the first photo is IMG_2426 | Flickr - Photo Sharing!

Nevermind about the second photo, it isn't correct anyway.
  Reply With Quote
Old 29th November 2011, 07:59 PM   #68
amptech is offline amptech  Scotland
diyAudio Member
 
Join Date: Jan 2009
Location: Glasgow
Send a message via MSN to amptech
Hi Joe..things can be confusing when dealing with faulty equipment or just starting out in the world of electronics... we all stated somewhere. I would say, try a small amp circuit to get the feel of things and if you blow it up..it'll be cheap to fix!.

Also try this site elliot sound products there's plenty on there.

Good luck.
  Reply With Quote
Old 30th November 2011, 10:47 PM   #69
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Quote:
Originally Posted by absolutjoann View Post

And they attached this photo:
2@15w | Flickr - Photo Sharing!

Okay, I'm really confused. Could someone maybe show me a picture for an example? I have no idea what I'm doing >,<

Cheers!
Jo
Hi again,

The photo they've attached is telling you...

Always having the black lead connected to the connector labeled GND (short for ground), put the red probe on Out 1+, Out 1-, Out 2+, Out 2- and take a picture showing the voltage measured by each. That way, they can see the board is under test (ie, that you're not making the voltages up to get a new board), and ensure you're making the correct connections.

But yes, the board does indeed appear to be faulty: there should not be 18v across the output. However, the way you've measured it (while a reasonable enough way of measuring it) isn't how they measure them. To be able to compare your amplifier to what it should be, they need you to measure it the same way.

Hope this helps,
Chris
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FOR REGA Turntable>>> The heavy weight + Vta adjuster+ceramic ball prooptiki Swap Meet 1 22nd May 2010 06:57 PM
Multi-DAC: Lynx AES16 -> DIR9001/SRC4392 (-> SRC4192) -> PCM1794A novec Digital Line Level 11 11th May 2010 12:57 PM
> Audio <> music <> quick <> synergy <> angst>? rick57 Everything Else 0 4th May 2007 05:03 PM
&gt;&gt;&gt; cheap 50,000uF 60V capacitors here &gt;&gt;&gt; Lubomir Swap Meet 0 1st February 2007 04:36 PM


New To Site? Need Help?

All times are GMT. The time now is 02:13 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2